We’ll never know, we’ll never know, we’ll never know. That’s the mocking-bird media refrain this season as we commemorate the 50th anniversary of America’s greatest mystery – the assassination of President John F. Kennedy. New York Times executive editor Jill Abramson hijacked a large chunk of her paper’s Sunday Book Review to ponder the Kennedy mystery. And after deliberating for page after page on the subject, she could only conclude that there was some “kind of void” at the center of the Kennedy story. Adam Gopnik was even more vaporous in the Nov. 4 issue of the New Yorker, turning the JFK milestone into an occasion for a windy cogitation on regicide as cultural phenomenon. Of course, constantly proclaiming “we’ll never know” has become a self-fulfilling prophecy for the American press. It lets the watchdogs off the hook, and excuses their unforgivable failure to actually, you know, investigate the epic crime.